Metallic packing.



Patented May 16, 1905.

PATENT OFFICE..

EDWARD J. FULLER, OF ELYRIA, OHIO.-

METALLIC PACKING..

SPECIFICATION `forming part of Letters Patent No. 790,201, dated May 16,1905. Application filed March 13, 1,905. Serial N0. 249,809.

My invention relates to metallic vrpacking for piston-rods and. thelike, and contemplates the use of a cage of any preferred form andconstruction secured to the head ofthe cylinder and provided withsuitable grooves for the reception of the packing-.rings which form thesubject-matter of this application.

The packing-rings employed are arranged in pairs in the grooves of thecage and are both cut into several parts, preferably four, although agreater'number of cuts may b e used with even .greater efficiency. Theseseveral parts are held together by means of a coiled spring arrangedlinV a groove in the pieces. The rings are not alike, however, as

the one nearest to the cylinder is provided with radial cuts, while theother is provided with tangential cuts, extending from the outer to theinner periphery thereof. This is of great importance, for thearrangement of the two kinds of cut rings makes a complete joint betweenthe rodand the cage.

The invention also consists in the construction and combination of partshereinafter described in the following specification, drawings, andclaims.

Referring to the drawings, Figure l is a horizontal sectional view of aportion of"a cylinder provided with my improved pack mg. Fig. 2 is aperspective view of the tangentially-cut rin Fig. 3 is a perspectiveview of the radiaIly-cut ring, and Fig. 4 is a perspective view of apair of the rings.

In carrying out my invention any preferred form of cage may be employedso long as it has suitable grooves for the reception of thepacking-rings but I have shown one form in the drawings which meets therequired conditions very effectively, and in such embodiment Arepresents a cylinder provided with the usual fiange a, to which issecured the cage B, containing the packingrings C and D. This cage B isfirmly held in plabceagainstthe flange (L by means of bolts A sheetofpac zing b2 is arranged between the vcage andthe cylinder-head for thepurpose of preventing anyleakage at that point.

.The cage B is further provided with suitable-grooves b3 for the pairsof packing-rings O and D.n Three. of these groovesare shown in thedrawings, although a greater number .may be used without departing fromthe The ring C of each spirit of the invention. pair is cut radiallyinto four parts c, and each of these parts has a Groove c for the coiledspring c2, which hoIds them all together around the piston-rod A. One ofthe parts c is provided with a pin c3, extending from the face thereoffor a purpose which will later appear. This ring receives the force ofthe pressure of the motor fluid inthe cylinder.

The ring D, as shown in Fig. 2, is cut tangentially into four parts, andthese several parts d are each provided with a groove d for receivingthe coiled spring d2, which holds the parts together. The cuts of thisring extend tangentially from the outer to the inner periphery thereof,whereby the ring will have unlimited opportunity for contraction 'aroundthe rod. One of these parts is proin pairs, consisting of oneradially-eut ring and another tangentially cut, is such that when therod passes through the rings the parts ofthe radially-cut ring will movein raldial lines away from the rod to accommodate themselves to theunevenness thereof, while the tangentially-cut ring will permit only t0its parts a movement in the lines parallel to the tangent cuts. In thisway one ring will assist the other and the several parts will fittightly about the rod and all leakage will be prevented.

Having described my invention, I claim- 1. In a metallic packing, thecombination with the cage, of a pair of rings within said cage, onehaving radial cuts and the other having tangential cuts extending fromthe inner periphery to the outer periphery there- IOO of, the cuts ofone ring being out of alinement with the cuts of the other.

2. In a metallic packing, the combination with the cage, of a pair ofrings within said cage one of said rings having four radial cuts and theother having four tangential cuts eX- tending from the inner to theouter peripherT thereof, means for holding the parts of both ringstogether, and means for retaining the cuts of one ring out of alinementwith the cuts of the other.

3. In a metallic packing, the combination with the cage, andcylinder-head to which it is applied, of a pair of rings within saidcage one of said rings having radial cuts and being placed nearer thecylinder-head than the other said other ring having tangential cutsextending from the inner to the outer peripherT thereof and being placedbetween the first-mentioned ring and the cage, means for holding theparts of the two rings together, and means for retaining the cuts of oniring out of alinement with the cuts of the ot er.

4. In combination, a cylinder-head and piston-rod, a packing-cagesecured to said cylinder said cage having suitable grooves for thereception of the packing-rings, a pair of rings in each of said grooves,one oi' the rings in each pair being radially cut into four parts andbeing placed nearer to the cylinder than the other, the other ring beingtangentially cut into four parts and being placed between the iirst ringand the cage the cuts of said last-mentioned ring extending from theinner to the outer peripheryT thereof, means for holding the severalparts of both rings together around the rod, and means for retaining thecuts of one ring out of alinement with the cuts of the other.

In testimony whereof' I have signed my name to this specification in thepresence oi' two subscribing witnesses.

EDWARD J. FULLER..

Witnesses:

NELLIE FLANNERY, FRED F. THOMAS.

